Voltage Controled Current Sink PUBLIC

Opamp and transistor used to convert a voltage to a current. The voltage to current relationship can be tailored using the following formula:

I = Vc/R1

Set R1 to a value that will produce the desired maximum current for the desired maximum voltage input.

V2 can be set as low as Vc_max + Vcesat + Vrload_min. If using a different OpAmp, make sure it's input common mode range includes ground or if not, then use a split supply (i.e. instead of connecting the opamp V- terminal to ground, connect it to a negative supply).

BTW: Rload is a place holder for whatever device needs to be current controlled (i.e. the current sink output is at the collector of Q1).

Not provided.